Part T -- HarmonicArialys is

In an electricalsystem, harmonicsare defined as voltages or currents or other This paper investigatesthe harmonic electrical parametersthat are presentin the content of the rotor current,rotor voltage system at some multiple integer of the and the torqueof the variablespeedconstant fundamentalfrequency. Whereasthe stator frequencydouble output inductiongenerator distortioncurrents are defined as the (VSCF-DOIG).The waveformsof thesevariables currentsinducedin the statorwindingsby the were generatedusinga directthree-phase rotor current harmonicsat frequenciesthat model and then analyzednumericallyfor their are not an integralmultipleof the stator harmonic content using a Fourier series fundamentalfrequency. subroutine. In addition, this paper investigatesthe stator distortioncurrents In convertingthe ac powerto dc power a that are beinginducedin the stator windings convertereffectivelybreaks or chops the ac by the rotor currentharmonicsat frequenciescurrent waveformby allowingthe current to which are not an integralmultipleof the flowduringonlya portionof the cycle. This s7tatorfundamentalfrequency.As a checkon resultsin thegeneration of harmonicvoltages the analysisthe calculatedstator current and currents on both ac anddc sides. waveform is comparedwith the experimental oscillogram. For a six-pulseconverterthe harmonics